How many letters does the top answer for “capital of south korea” have?

The most common answer is seoul (5 letters).

Crossword clue: capital of south korea

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

seoul 5 letters wd-fact

the capital of South Korea and the largest city of Asia; located in northwestern South Korea

a person from south korea 50% similar → southkorean

actor from south korea 50% similar → jihyun, kiduk, kim

capital of north korea 50% similar → pyongyang

capital of south africa 50% similar → bloemfontein, capetown, pretoria

capital of south sudan 50% similar → juba

city in south korea 50% similar → ansan, anyang, busan

currency of south korea 50% similar → won

dish from south korea 50% similar → chapagetti